Rockwell Automation SA500 AC Power Modules - Manual (Page 49)

Diagnostics and Troubleshooting 5-3
UDC Run Fault (Bit 14)
LED indicator: N/A
Bit 14 will be set if the UDC task stops while the minor loop is running in the PMI
Regulator. Error code 1014 will also be displayed in the error log of the UDC task in
which the fault occurred.
Communication Lost (Bit 15)
LED indicator: COMM OK
Bit 15 will be set if the fiber-optic communication between the PMI Regulator and the
UDC module is lost due to two consecutive errors of any type. Error code 1015 will
also be displayed in the error log of the UDC task in which the fault occurred.
5.2 Power Module Warnings (UDC Register 203/1203)
Drive warnings are reported in register 203/1203 and latched until the Warning Reset
bit (register 100/1100, bit 9) is turned on. These warnings cause no action by
themselves.
Excessive Ground Current (Bit 0)
Bit 0 will be set if ground current exceeds the configured ground fault current level.
Reference in Limit Warning (Bit 4)
Bit 4 will be set if the PMI torque reference value (register 102/1102) exceeds the
maximum value permitted (+/- 4095) and is being limited by the PMI.
Auto Tuning Aborted (Bit 5)
Bit 5 will be set if an automatic tuning procedure (resolver balance, gain calibration, or
alignment) is not successful.
Speed or Position Gain Out of Limit (Bit 10)
Bit 10 will be set if a speed or position loop volatile gain value (registers 150/1150 to
166/1166) is out of limit. This bit will only be set if the position or speed loops are
enabled.
Rail Communication Warning (Bit 13)
Bit 13 will be set if a rail communication problem is detected and logged in register 4,
10, 16, or 22. Refer to tables 3.4 to 3.6 in instruction manual S-3044 for detailed
information.
CCLK Not Synchronized in PMI (Bit 14)
Bit 14 will be set if the CCLK counters in the PMI and UDC modules are momentarily
unsynchronized.